The Doughty Quick Trigger Clamp enables one person to hang heavy luminaires and fixtures easily and safely. Quick Triggers are available in two versions: standard to fit tubes 38mm-51mm and Titan Triggers to fit tubes 48mm-80mm diameter. Sprung loaded jaws remain open, leaving both hands free to lift and position the load. The base of the clamp is slotted to hold either an M10 or M12 bolt head or nut captive without turning. Constructed from high tensile aluminium extrusions, the Quick Trigger Clamps have been tested and certified with TÜV.